Dental chair



Oct. 30 ,1923. 1,472,272

G, D, HECK DEN-TAL GHAIR Filved Jan. '7. A1921 2 Sheets-Sheet 1 G.D.HECK

DENTAL CHAIR Oct. 30 1923.

2 Sheets-Sheet 2 Fi}ed Jan. 7.

.Patented @et 30, i923. v

ai .serres rra rinata ir GEORGE D. HECK, OF PRINCE BAY, NEW YORK, ASSGNOR TO THE S.

S. WHITE DENTAL MANUFACTURING CCIVIPANY, `.A CORPORATION 0F PENNSYLVANIA.

i `DENTAL CHAIR.

Application led January 7. 1921. Serial No. 435,763.

To all whom t may concern.'

Be it known that L Gnonon D. HECK, a citizen ofthe United` States, and a resident of Prince Bay, in the county of Richmond, State of New York, have invented certain new and useful improvements in Dental Chairs, of which the following is a speciticatic-n, reference being had to the accompanying drawings.

My invention relates particularly to footrests for dental chairs, and Yis especially directed to that class of foot-rests in which the foot-rest frame is pivotally connected to and supported by the frame of the footboard or platform and capable of being enten-ded substantially into alinement with sail `foot-board or platform.

The principal objects ofv my invention are to provide a dental chair with a foot.-` rest having its frame pivotally connected to the frame of the foot-board or platform, and yielding-ly supported in upwardly in ruined relation to the frame 4of said footboard or platform and arranged to yield to any abnormal pressure exerted by the patient in the chair, to a position substantially alined with the foot-board or platform or approximating such position.

Other objects of my invention are to provide yielding means for supporting a footrest in normally inclined relation to the foot-board or platform of a dental chair, and to provide means adjustable to vary the tension of said yielding means whereby the pressure requisite to effect the movement of said foot-rest toward a position approximating the alineme-nt with the foot-board or platform may be varied.

Specifically stated, the form of my invention as hereinafter described, comprises a foot-board frame, and a foot-rest frame pivoted to said foot-board frame and noriaily maintained in upwardly inclined reiation thereto by a plunger rod which is forced forwardly against said foot-rest frame by spring pressure tending to yieldingly maintain said foot-rest frame in its normally inclined position but arranged to yield to a predetermined pressure exerted upon the foot-rest by the patient in the chair. Y

My invention also includes all of the various novel features of construction and arrangement as hereinafter more denitely specied.

In the accompanying drawings, Figure 1 is a side elevational view of aqdcntal chair conveniently embodying a foot-rest constructed in accordance with my invention;

F ig. 2 is an enlarged central vertical longif" tudinal sectional view the foot-board or platform and attached footerest in its normalpposition as shown in Fig. 1; Fig. 3 is a plan view ofthe foot-board or platform and attached foot-rest shown in Figs. 1 and 2 extended to its abnormal substantially alined position; and Fig. 4f is a side elevational view of the foot-board or platform and the attached foot-rest extended as shown in Fig. 3.

In said figures, the chair comprises the` frame 1, seat 2. baclr 3, headerest 4f and arm-rests 5, and has the usual depending frame bracket arms 6 which carry the footboard or platform frame 10 having the foot-board 12 supported thereon. The'platform frame 10 has its forward transverse bar 13 provided with hinge lugs 15 pivotally connected by the shaft 16 with the hinge lugs 17 of the foot-rest the pivoted extension arms 19 carrying the foot-rest bars 20 `and 21, of well known construction.

The foot-board or platform frame 10 lis provided with stop lugs 23 forming abutments for the stop lugs 24 on the footrest frame 18, and serving to limit the upward pivotal movement of the foot-rest frame .18, as best shown in Fig. 2, and said footboard or platform frame 10 is provided with abutw ments 25 arranged to be engaged by the abutinents 26 on the foot-rest frame 18 and serving to limit the downward movement of said foot-rest frame 18, as best shown in Fig, 4.

The foot-rest frame 18 is normally supported in the upwardly inclined position shown in Figs. 1 and 2 by the plunger rod 27, which bears against the lug 29 and which is supported by the bearing lugs 30 and 31 depending from the foot-board frame 10, and said plunger rod 27 is normally forced forward in the direction of the arrow indicated thereon, by the spiral spring 33, which is held under compression between the lug 31 and the nuts 34 and 35 adjustable on said shaft to vary the compression of said spring and the consequent pressure of said plunger rod 27 against the lug 29, whereby the pressure of the patients foot requisite to move frame 18 which has stand the pressure incident to supporting. the foot of the patient in the cha-ir under structed in accordance therewith will Withnormal conditions, yet it will yield to any abnormal pressure vvliich the patient may exert asby reason of the influence of an anesthetic.

I do not desire to limit my invention to the precise details of construction andv arrangement as hei'ein set forth', as itis obvious that various modifications may be made therein ,Without departing from the essential features ot my invention asde'ned inthe appended claims.Y

VHaving thus described `my invention, I

' claim 1. In a dental chair the combination with a 'foot-board having a frame, of a foot-rest having a framepivoted `to the frame of'said foot-board, and yieldingmeans tending to hold said foot-rest traine in inclined relation Vto` saidv foot-board frame.

2. A dental chair having a foot-board comprising a frame providedivith depending bearingsa plunger longitudinally movable in said bearings, a spring tending to force said plunger forwardly, a foot-rest having its frame pivoted tosaid foot-board lraine and yieldingly supported byv said plunger.V Y

A dental chair comprising a foot-board and footrest hingedly connected, a plunger Vrod movable longitudinally of said footboard and normally tending to hold said foot-rest in its operative position, and a spring tending to force said rod into engagement with said foot-rest, and arranged to yield to permit said ootrest to move to an inoperative position, in alinement with said :toot-board,I or approximately such posi-V tion.

` 4:.V A Vit'oot-rest frame pivoted to the foot-'l Vboard frameof a dental chair, a plunger rod longitudinally Vmovable on said foot-board frame and tending to yieldingly holdYV said 'foot-rest frame inrits operative position, a. spring tending tol force said plunger rodv into engagement With said ootrest frame and arranged to yield to an abnormal pressure exerted upon said foot-rest, and permit said foot-rest to assume a position substantially alined ivith said foot-board. w

5. A foot-restV frame vhaving abutments vandrpivoted to aV footeb'o'aid frame having abiitinents arranged to engage the abutments on said foot-rest frame'tov limit its range ot pivotal inovement,.aiid a spring-pressed plunger tending to yieldingly hold saidfoot-V rest in its operative position and arranged toV yield when a predetermined Vpressure iS. exeitedupon said foot-rest. i

6. Affoot-rest frame having abutments and pivoted to the outer end of a ootboard frame having opposed abutmentsarranged to engage the ab-utinents on saidfo'ot-rest frame to liinit'its range ofpivotal. movement, and means tending to yieldingly holdsaid foot-rest in its operative..positionY and-v arranged to yield when a predetermined pressure `is exerted upon said `toot-rest.

7.` Aoot-rest for' a dental chairhingedly connected to Yswing .toward and Yfrom said chair, a horizontally extended plunger .rod normallyV tend-ing to hold said foot-rest in its operative position, a springite'nding to force said plunger rod into engagement with said ootrest, and arrangedto yield'to permit the oot-restto move to 2in-inoperative position by abnormal pressure. Y

In Witness whereof, I

my hand this 29th day ofV December, A. D., 1920. Y Y

. VGEORGE D. HECK. Witnesses: f

lALBERT L. Houfownnr.,

SAMUEL R. BARTON. Y

have hereunto set ,Y 

